Single driven-shaft combined boring



LANGFELDER Aug. 2, 1949. Q

SINGLE DRIVEN-SHAFT COMBINED BORING AND RECIPROCABLE-SAW MACHINE Original Filed July 7, 1944 2 Sheets-Sheet 1 mm \N R NM mm Q. kw w QM a M\ mm 2 a H G mm M Fm 3 Q R N, r am A. H

- INVENTOR I 77 LANGFELDEI? ATTO R N EYS Aug. 2, 1949. o. LANGFELDER SINGLE DRIVEN-SHAFTCOMBINED BORING AND RECIPROCABLE-SAW MACHINE Original Filed July 7, 1944 2 Sheets-Sheet 2 Maul ATTORNEYS lll'll'lllll Reissued Aug. 2, 1949 SINGLE DRIVEN-SHAFT COMBINED BORING AND RECIPROCABLE-SAW MACHINE Otto Langfelder, New York, N. Y.

Original 2,417,170, dated March 11, 1947, Serial No. 543,783, July 7, 1944. Application for reissue February 28, 1948, Serial No. 11,934

8 Claims. 1

My invention relates to machines known generally as jig-saws or scroll-saws. These machines are used to form designs through pieces of wood, fiber board, plywood or the like, in from the marginal edges thereof. In operation, the design is first outlined on the material to be treated, a pilot opening is made through the body of the material, and then the sawing blade is inserted and the designs sawed out. Conventional devices of this type have means for boring the hole, and means for sawing the material, and in some constructions both means have been actuated by the same source of power.

The main object of my invention is the provision of a jig-sawing machine having a single means for boring the hole and for sawing the material.

Another object of my invention is the provision of a jig-sawing machine having means for boring the hole and sawing the material, in which initial rotary movement of the hole borer is changed to reciprocating straight-line movement of the sawing means.

Another object of my invention is the provision of a jig-sawing machine in which a pair of shafts is provided, one of which rotates and the other of which is rotated and reciprocated by the first shaft.

Another object of my invention is the provision of a jig-sawing machine having a pair of shafts, one of which has a spur gear and a bevel gear thereon, rotation of said shaft causing successively rotation of the other shaft and straightline reciprocation thereof.

Another object of my invention is the provision of a device for boring holes and sawing material.

Another object of my invention is the provision of a device which may be rotated for hole boring and reciprocated in a straight line for material sawing. I Other and further objects of my invention will, in part, be obvious from the following description of an illustrative embodiment thereof, and 'still other objects will be specifically pointed out hereinbelow. The scope of my invention is not to be limited except in accordance with the claims appended hereto.

In the drawings annexed hereto, forming a part hereof,

Figure 1 is a side elevational view, partly in section, of one form of device constructed according to and embodying my invention;

Fig. 2 is a front elevational view thereof, also partly in section;

Fig. 3 isa side elevational view, showing the device engaged for hole boring;

Fig. 4 is a horizontal section on the line 44 of Fig. 3;

Fig. 5 is a horizontal section on the line 5-5 of Fig. 3;

Figs. 6 and 7 are, respectively, side and edge elevational views of the hole borer and sawer of my invention.

My device comprises a frame HI, formed as by casting or otherwise, having a pair of horizontally extended arms l2, I4. The lower arm 04 terminates in, or is secured to, a fiat-topped. work-supporting table IS. The upper arm [2 is vertically aligned with arm l4 and terminates in a shelf I8, at its upper margin, reaching out over table ii. A bracket 20 is provided, extending downwardly from the lower extremity of arm l2, having a horizontal shelf 22 parallel to shelf [8. A second bracket 24 is provided extending down from shelf 22 terminating in a shelf 26 reaching out over table I6, vertically aligned with and parallel to shelf l8. A support bar 25 is provided vertically aligned with bracket 24 extending from shelf l8 to bracket 24. Frame l0, comprising arms l2, I4, table 16, shelf l8, bar 25 and brackets and shelves 201, 22, 24, 26 may be formed all in one piece, as desired or as may be convenient.

A Vertically extending shaft 28 is provided extending through vertically aligned openings in shelf I8 and shelf 22. A frame 30 is provided above shelf 80, and a pair of collars 32, 34- are mounted on shaft 28 above frame 30 and below shelf l8, to hold shaft 28 in position while permitting rotation thereof. A spur gear 40, and a bevel gear 42 are mounted on shaft 28, for rotation therewith. The gears are of such radius as to extend through bar 25, which is laterally slitted to permit the gears to extend therethrough. Any conventional means (not shown) may be provided to impart rotative movement to shaft 28 and gears 40, 42. As shown, the spur gear 40 is mounted on shaft 28 below bevel gear 42.

A second shaft 50 is provided extending through vertically aligned apertures in shelves I 8, 2B. Shaft 50 is suspended from a vertically disposed bevel gear 52 by a link 54, as will be detailed below. A ring gear 6|! is fixed onto shaft 50. Gear Gil is substantially wider than spur 40. A collar 62 is also fixed on shaft 50, the collar permitting rotation of shaft 50 therewithin. A pin or bolt 64 holds collar 62 to the bottom of link 54, the upper end of link 54 being pivotally secured to bevel gear 52 near the marginal edge 3 thereof. A collar 66 is fixed onto shaft 50, below shelf ID, to limit upward movement thereof.

The bottom of shaft 50 is socketed to receive and hold therewithin a combined borer and sawer device, which comprises a flat elongated blade of thin section, having a pointed end 10 and teeth 12 alonganedge thereof. End HI may be threaded, as desired to facilitate the hole boring.

Bevel gear 52 is mounted on a plate 80, dovetailed within bar 25 and vertically slidab'le therewithin. A bearing 82 (Fig, 4) is, fixed onto the rear of bar 25, and a shaft 84 provided pros jecting laterally therethrough having a spur gear 86 on the end thereof. A rack 88 is secured to sliding plate Bll, in mesh with spur 86. A number of levers, as 90. 90 are fixed t'otlie endo'f shaft 84, actuation of which levers will cause rotation of shaft 84 and spur 86 and movement up and down of plate 80.

Figure 3 shows my machine ready for use. The plateBlHs racked toiits-upwaid limit-raising shaft 50 above the work suppbrting table l6, and leavinga clearance between the bottom of the operating blade and table It. Gear 60 is so positioned on s'haf-t: 50, that. at the lower edge thereof it is in mesh with spur 40. As shaft 28 is rotated, as by any ordinary means (not shown) spur gear l'fl-isrota ted along with it and rotates shaft 50*. Crank arm 90, 90 are turned counterclockwisely to cause downward movement of plate 80 and shaft 50, the gears MI and remainingin mesh and botlr shafts rotating in opposite directions. The rotating point 1 2 c-fth'e blad'e is brought into contact with the material being worked and a hole is bored tl ierethrou'gli, the blade moving downwardly under theinfl'uenc'e of the gear 86 rack 88" relative'movement, until gear 60' is car'- ried Items? and disengaged from Spill 4'0.

Opening 92 through shelf 26 (see Fig; 5) is enlarged to accommodate movement of the saw biade during' the reciprocating movement there of, as willb'e explained-below. rib S'B isfQrmed on shaf-t; 50", below gear 60; extending laterally of the shaft, and a vertically extending shoulder 5'8 is formedon: shelf 25 rising upwardly thereof, so as to form a guide for the blade during the sawin'g movement thereof. I

As depicted in Fig. 5, opening 92' is of ke -ho1e shape and shoulder 98 boundsa'; side of the upper end or the notch portion of opening 92 to facilit'a-te entry of rib 96' into such notch portion pre paraitor-y to reciprocatory sawing movements of shaft 5i). During reciprocatory sawing move= merits of." shaft 513" and boring-sawing tool 12', the rip at, by its ooperation with shoulder at and the notch portion of opening 92, resists twisting of the work-engaging portion of the tool byturning moverrients of the work on table Hi.

As shaft 511" is brought downwardly, therefore, gear '60 is slid along spur ii) and ultimately dis engaged therefrom, causing a cessation or rotatlbn of saidshaft it. As the sliding plate 80' is carried furtheralong on' it downward path; by rotation of crank arms Si), 90,. the vertical bevel gear 52 is b'ro'ught in'to engagement with bevel gear 42; horizontally disposed on the r'cita'tirig shaft 2'8. As gear 62 rotates; it'calusesvertically reciprocating movement shaft 50, through pit; man or link 54. and" collar" 62, the gears Being held in" engagement by pressure, on emnkiarms an, manaipenmts' formation afuie desired-designby the. sawblade edge, Hf.- w

the desired-sawing; has-hee oompleted crank arms, are rotated inarclockwi-sedirec- 4 tion and the shaft 50 raised to disengage the bevel gears 42, 52, and the mechanism restored to the position of Fig. 3. Fig. 1 shows the apparatus in sawing engagement.

The main feature of my invention is the provision, in a single means, of a hole borer and sawer mechanism, tq-wit, shaft 5%, which rotates to bore the pilot hole or opening through the material being worked upon, and the same shaft 50 which is thereafter straight-line reciprocated to saw the desired design through the material being treated. The associated feature of my inve'riti'on is the blade, which is pointed and which maybe threaded at its pointed end for hole boring purposes, and which has a serrated or toothed edge or edges, for sawing purposes.

My device, is simple in construction and operation, and represents a radical simplification of devices for jigor scroll-sawing.

Having now described by invention, what I claim and desire to secure by Letters Patent is:

l. In a device of the: character described-f a drive: shaft; a driven: shaft; combined boring. and sawing. means on the driven shaft, gear means associated with the drive shaft to rotate said driven shaft, and second gear means associated with the drive shaft, upondisengagement" of the rotating means, selectively. to straight-line re ciprocate said driven shaft.

2. In a device of the character described; a shaft, a. hole borer and sawer mounted thereon; gear means to actuate the shaft for hole boring rotation thereof, and second gear- Irfeans operable upon disengagement of the rotating means; selectively to actuate said shaft for sawing recip rocati'o'n' thereof.

3. In a device of the character described-a pan of vertically dispose'dshafts; one" fwhich is retatable only, a: pair of gears on id first sh'af" a gear on said second shaft; means to engage ne of the" gears onthe first shaft with the gear on the second shaft to cause rotation of said s'eeond shaft, means upon disengagement of the said gear on the first shaft with the gear on the second shaft to cause engagement of theshond g'eaf'on the first shaft with means connectd to the sec ond shaft to impart straight-line reciprocating movement to the said second-shaft.

4 In a} device of the character described; a rmme; a pair of verueaut disposed shafts, one ofwhich is rotatable only, a spur" gear and a bevel gear on said first Shaft, a drivengear on said'secondsliaft, arida bevel g'earofi saisfranie: a connection between the bevel gear onthe frame enema second shaft, means to engage the'spur gea'r on first shaft with the driven gear on the second shaft to cause rotation of said sebb nd shaft, meansupon diseng'agement of the spur and driver-i gears to' cause selective engagement of the-beve1 gears to impartstraagiit-mereei rbe eating movement to the said secb'i'idf'shaft.

5. In a device of the character desofibilin earns; a pair of veft'ically'niountd shafts'ifi said frame, aspur" gear on the first of Said 'sliiifts,;a bevel gear on; said' shaft dispcsedat right angles thereto, a driven gear On said second shaft; a never gear on" said frame at right afi'gl'is to the bevel gear on on, the first shafta coin sen hole borer and sawer mo'ii'ht'difi the bdttb'rfi of the second, shaft, a driven gear on said, start, and a. connection b'etweeds'aid second shaft and the frame-mounted bevelgear; means wt gage t e spur gear w th t e' r ea to rotate the second shaft for hole and means to engage the bevel gears to cause vertical reciprocating movement of the second shaft for sawing purposes.

6. In a device of the character described, a frame, a pair of vertically mounted shafts in said frame, a spur gear on the first of said shafts, a bevel gear on said first shaft disposed at right angles thereto, a driven gear on said second shaft, a bevel gear on said frame at right angles to the bevel gear on the first shaft, a combined hole borer and sawer tool mounted in the bottom of said second shaft, a driven gear on said second shaft, a connection between said second shaft and the frame-mounted bevel gear, means to engage the spur gear with the driven gear to rotate the second shaft for hole boring purposes, means to engage the bevel gears to cause vertical reciprocating movement of the second shaft for sawing purposes, and engageable means presented by the second shaft and frame respectively and mutually engaging only when the shaft is being reciprocated, cooperating to resist turning movement of the work engaging portion of the tool.

7. A device according to claim 6 wherein the engageable means carried by the shaft and the REFERENCES CITED The following referenlces are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,122,6 1 Kirby July 5, 1938 FOREIGN PATENTS Number Country Date 45,639 Sweden Sept. 13, 1919 384,937 Great Britain Dec. 15, 1932 

